Dr Andrew Jeffrey has written extensively on military and maritime history. He authored a trilogy of books on Scotland’s role in the Second World War: This Dangerous Menace, This Present Emergency and This Time of Crisis. Media work includes research and on-air contributions for The Thistle, The Crown and The Swastika (BBC 1995), Salvage Squad (Channel 4 2001), Timeframe (SMG 2004), a BBC educational project on the Second World War (BBC 2010), the Dutch documentary The O-13 Mystery – Still on Patrol (Wing TV 2013) and the French documentary Submarines against the Nazis (ZED for RMC Découverte 2019).